Just finished Assassination Vacation last night. Excellent. Aside from her usual wit, Vowell included several awesome quotes from other places. One of my favorites is from James Garfield's address at some commencement:

It has occurred to me that the thing you have, that all men have enough of, is perhaps the thing that you care for the least, and that is your leisure—the leisure you have to think; the leisure you have to be let alone; the leisure you have to throw the plummet into your mind, and sound the depth and dive for things below. (134)